Watch the Ab add#9#5 online guitar lesson by Brad Carlton from Guitar Lab: Open String Universe
This chord voicing is achieved by moving the lowest four voices of the open E form up 4 frets. The first and second strings(voices) remain open and thus extend and/or alter the basic major chord which is always occuring in voices 6 through 3.
The voicing for this chord is as follows(from low to high in pitch):
6th string(voice) 1
5th string(voice) 5
4th string(voice) 1
3rd string(voice) 3
2nd string(voice) #2(b3 #9)
1st string(voice) #5(b6 b13)
Analyzing this chord against the 6th voice (as the root) reveals the name as Abadd#9#5.
The applicable scale(s) for soloing over this chord would be:
Ab Super locrian
Ab Bbb Cb Dbb Ebb Fb Gb
1 b2 b3 b4 b5 b6 b7
Notice that the super locrian mode does not contain a natural 5 which is occuring in voice 5 of the chord.